The Waveform Necklace by Berlin-based designer David Bizer is a cool custom necklace that is created using an audio recording of a voice. The necklaces can be ordered from Bizer in acrylic, wood or silver and are strung on leather, PVC or elastic . Bizer has also recently provided a detailed tutorial on Instructables to make the necklace at home.

The representation of the waveform looks
preciser with thinner materials.
Short samples work better.
Speech samples look more interesting
compared to music with it’s repeating patterns.
If you choose a song:
use a part with vocals or melody.